BPG致力于知识的发现和传播
Total Visits of This Article
2021 | 总访问次数
排名 国家/地区 数量 占比
1 China 429 55.4%
2 United States 131 16.9%
3 Netherlands 105 13.5%
4 Germany 59 7.6%
5 Canada 15 1.9%
6 Sweden 10 1.3%
7 France 4 0.5%
8 India 3 0.4%
9 Taiwan 3 0.4%
10 United Kingdom 2 0.3%
11 Serbia 2 0.3%
12 Singapore 2 0.3%
13 Iran, Islamic Republic of 2 0.3%
14 Korea, Republic of 2 0.3%
15 Hong Kong 2 0.3%
16 1 0.1%
17 Norway 1 0.1%
18 Russia 1 0.1%
19 Ukraine 1 0.1%